"Rapidox 1100BF bench mounted CO gas analyser for 0-2000ppm*,0-3%, 0-10%, 0-30% or 0-100% (specify on order) CO analysis. With internal sampling pump and pressure correction. Includes programmable alarm and analogue outputs with datalogging software. * 2000ppm IR sensor available at extra cost.Front mounted gas fittings, F, are standard; if you require rear mounted gas fittings, R, please state preference on order (available at same price)."